The AirPhysio device is very similar to the Aerobika or the Acapella devices. They all work pretty much the same way to loosen mucus and make it easier to cough up and out. Different people like one or the other, but they all work pretty much the same way are are usually effective if used properly and regularly.

Thank you so much.

I have all 3, and like Jean said they all work about the same. It's just what ever you like and can afford.

Thank you very much.

Yes I i it use it. I think it helps